Bride-to-be Meghan Markle looks luminous in floral print summer dress as she steps out with Harry in London

Prince Harry and Meghan Markle arrive at the Australian High Commission in London to attend a reception celebrating the forthcoming Invictus Games Sydney 2018. Photo: Dominic Lipinski/PA WireMeghan Markle leaves the Australian High Commission in London after attending a reception celebrating the forthcoming Invictus Games Sydney 2018. Photo: Dominic Lipinski/PA WireMeghan Markle arrives at the Australian High Commission in London to attend a reception celebrating the forthcoming Invictus Games Sydney 2018. Photo: Dominic Lipinski/PA WireMeghan Markle leaves the Australian High Commission in London after attending a reception celebrating the forthcoming Invictus Games Sydney 2018. PRESS ASSOCIATION Photo. Picture date: Saturday April 21, 2018. See PA story ROYAL Harry. Photo credit should read: Dominic Lipinski/PA WireMeghan Markle leaves the Australian High Commission in London after attending a reception celebrating the forthcoming Invictus Games Sydney 2018. Photo: Dominic Lipinski/PA WireBritain's Prince Harry and Meghan Markle arrive to attend a reception celebrating the forthcoming Invictus Games Sydney 2018, hosted by Malcolm Turnbull, Prime Minister of Australia, and his wife Lucy Turnbull, at Australia House in London, Britain April 21, 2018. Alastair Grant/Pool via ReutersPrince Harry and Meghan Markle arrive at the Australian High Commission in London to attend a reception celebrating the forthcoming Invictus Games Sydney 2018. Photo: Dominic Lipinski/PA WireBritain's Prince Harry and Meghan Markle arrive to attend a reception celebrating the forthcoming Invictus Games Sydney 2018, hosted by Malcolm Turnbull, Prime Minister of Australia, and his wife Lucy Turnbull, at Australia House in London, Britain April 21, 2018. Alastair Grant/Pool via Reuters